En réponse à Stephen DeGrace <[log in to unmask]>: > > Natrium is the root for the symbol of the element > sodium (a metal), and is the word used in some > languages (German, e.g.). Furthermore, Nitrogen is > colourless. Just like oxygen in small quantities. Oxygen has a colour because it has two > unpaired electrons - it is, I believe, a triplet > radical in the ground state (??). Not really, but I won't enter in those details. And that colour > is... blue. Not the gas. Liquid air is blue because of the presence > of oxygen, and liquid oxygen is pronouncedly blue. But you try to justify something by something else. The colour of liquid oxygen is due to impurities, the purer the liquid oxygen the less blue it is. As for the sky, it is blue because of light scattering, and this scattering is mainly due to nitrogen since it's the majority gas. An atmosphere of nitrogen without oxygen would still be blue. It's only the thickness that matters. I remember that the teacher made the calculations for the light scattering in the atmosphere and neglected the presence of the oxygen. Still he got the right colour :) . I > don't think that natrium even has a relation to the > French root for nitrogene (is it not something like > nitrogène?.. I don't remember) > "Azote". It's the big difference between the French and English word that mistakened me :(( . > I am not willing to make statements about the > atmosphere, because I don't know enough about the > physics, but from what I know about the chemistry, > this is incorrect in every respect. > Still it's correct. > > If this is the case, it is for a reason other than > that which you cite. > Nope, I'm pretty sure I'm right. It's the kind of things I don't forget, even if the details are fuzzy. Christophe. http://rainbow.conlang.free.fr Take your life as a movie: do not let anybody else play the leading role.